G991B Combination file | Samsung S21 5g

'Fingerprint Works But Unlock Delayed'' happens when SM-G991B’s security checks fail. Cause: Biometric lag. Fix it by: Replace FPC.

If 'Camera Colors Inverted' shows after OTA or Odin flash on SM-G991B, the root issue might be Sensor fault or connector loose. Recover by: Replace module.

SM-G991B displaying the 'Mainboard Getting Hot' error likely encountered Short on main board. Restore the device by following: Use thermal camera to isolate.

Samsung SM-G991B showing 'Sim Eject Mechanism Broken' after Odin flash suggests Mechanical latch damage. A known working method is: Replace SIM tray module.

If you're facing 'Fingerprint Not Registering' on your SM-G991B, it's possible the problem lies in Sensor cracked. Experts usually recommend flashing combination firmware followed by: Replace fingerprint module.

For Samsung SM-G991B devices, 'Camera Not Opening' often occurs after Camera IC fault. This may require a two-step fix—starting with firmware verification and ending with: Replace camera module.

If your SM-G991B exhibits 'Dead Phone With No History of Drop/Water', it's a sign of system conflict often initiated by Short in baseband power. Start by reviewing device firmware integrity. Then proceed with this known fix: Check and replace faulty cap.

Flashing errors resulting in 'Partial Display Fade' are common on SM-G991B when OLED burn-in exists. Solution is: Replace display.

On SM-G991B, 'Display Dims During Use' usually arises after failed firmware installs due to Ambient light sensor failure. To recover the system, technicians recommend: Replace sensor module.

SM-G991B displaying 'USB Detected as Unknown Device' due to Driver IC fault should be serviced using: Replace USB controller.

When 'USB Connected But Not Charging' occurs on the Samsung SM-G991B, it's usually due to Overvoltage protector blown. Start by booting into download mode and flashing a verified firmware. If the error continues, follow this advanced recovery method: Replace charging protection IC.

Samsung SM-G991B encountering 'Intermittent Charging' points to Loose solder on charging IC. Industry experts recommend the following remediation steps: Resolder or replace IC.

In SM-G991B, 'Display Not Turning On But Phone Vibrates' tends to surface after improper firmware patches. Often linked to Backlight circuit damaged. Recommended approach: Replace LED driver or filter.

A firmware crash on SM-G991B can cause 'Front Camera Black'. Likely due to Front cam flex torn. To resolve: Replace flex or module.

The 'USB OTG Not Working' problem on your Samsung SM-G991B typically stems from USB IC faulty. This issue can disrupt normal boot operations or cause the device to become unresponsive. To address this, ensure that you're using the correct binary firmware. The recommended solution is: Replace USB controller IC.

Technically, 'No Display' on SM-G991B results from Display IC failure, especially after firmware rollback. To undo the fault, follow this: Replace display IC.

SM-G991B displaying 'Auto Restart' due to Faulty NAND memory should be serviced using: Replace motherboard or reball NAND.

Experiencing 'Sim Not Detected' on a SM-G991B may be caused by Sim IC failure. Technicians suggest starting with basic troubleshooting like firmware compatibility checks. If that fails, proceed with: Replace Sim IC. This approach often resolves persistent issues.

On SM-G991B, 'USB OTG Not Working' usually arises after failed firmware installs due to USB IC faulty. To recover the system, technicians recommend: Replace USB controller IC.

Your Samsung SM-G991B is showing the 'No Display' error which is frequently linked to Display IC failure. This condition can affect device performance or even lead to a soft-brick. Based on expert guidance, the fix involves: Replace display IC.